19722047 has 2 divisors, whose sum is σ = 19722048. Its totient is φ = 19722046.

The previous prime is 19722013. The next prime is 19722067. The reversal of 19722047 is 74022791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19722047 - 2¹⁴ = 19705663 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19722067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9861023 + 9861024.

It is an arithmetic number, because the mean of its divisors is an integer number (9861024).

Almost surely, 2^19722047 is an apocalyptic number.

19722047 is a deficient number, since it is larger than the sum of its proper divisors (1).

19722047 is an equidigital number, since it uses as much as digits as its factorization.

19722047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 19722047 is about 4440.9511368625. The cubic root of 19722047 is about 270.1784234478.

The spelling of 19722047 in words is "nineteen million, seven hundred twenty-two thousand, forty-seven".